docs: def tapered_gutenberg_richter_pdf(moment, moment_threshold, beta,
                                    corner_moment):
      '''
      Tapered Gutenberg-Richter Probability Density Function
  
      :param float or numpy.ndarray moment:
          Moment for calculation of rate
  
      :param float or numpy.ndarray moment_threshold:
          Threshold Moment of the distribution (moment rate essentially!)
  
      :param float beta:
          Beta value (b * ln(10.)) of the Tapered Gutenberg-Richter Function
  
      :param float corner_momnet:
          Corner moment of the Tapered Gutenberg-Richter Function
  
      :returns:
          Absolute probability of moment release > moment
      '''
      return ((beta / moment + 1. / corner_moment) *
              tapered_gutenberg_richter_cdf(moment, moment_threshold, beta,
                                            corner_moment))